here's dennis murphy with "before the storm." >> the woman captured on security camera, moving ghost-like from one room to the next is 37-year-old crystal mcdowell, a real estate agent from baytown, texas. it's thursday, august 25th, 2017. at 7:35 a.m., crystal gets into her black mercedes coupe and backs out the driveway. looks like she's on her way to work. but crystal never makes it to the office that day. texts, phone calls and emails go unanswered. when crystal's extended family gathers later that evening to watch a pay-per-view boxing match, cousin jade cherry says they aren't sure if they should be annoyed or concerned. >> it was the night of the mayweather and mcgregor fight. and my whole family is here. and my brother comes up to me immediately. and he's like, "crystal's missing." but in my head i'm like, "what?" like, you don't think -- you know, you're like, "well, find her." like, "what do you mean?" >> yeah. that doesn't make sense. >> he's like, no, she's missing. no one's talked to her since 7:00 in the morning." i was like, "well, that -- that doesn't mean anything. like,

here again is dennis murphy with betrayed.he phone stayed with the person that we believe took. melissa >> now they were focused on miami gardens, where the phone had been stationary for several hours after the. murder police asked militias best friend debra va guess if she knew anyone who lived in that area. >> debbie says my husband, tony. i'm going through divorce. with debra was dumbstruck. tony, melissa. >> you have no reason to do this to melissa? you have no reason? >> so you're telling the detectives you're looking at the wrong guy. he had met her a few times. over the years that we weren't social. never told police that she and tony had been married for 17 years. and had four children. they had separated more than a year earlier. tony had been moving to a house in miami gardens with a. friend for 20 years, he worked for a florida east coast rail war, he basically drove a tree for. 11 >> police drove a train for a living detectives want to talk to toni and recorded the conversation. >> how well did you, know this debor

here's dennis murphy with "and then there were three". >> it was an act of unspeakable violence. >> it was a really horrific crime. everybody was scared. >> a murder that shattered a family. >> my parents were devastated. my mother eventually did not cool out of the house. >> a who done it that grabbed hold of the city and wouldn't let go. >> it's been a cloud hanging over the community for 40 years. >> a case that touched generations of investigators, who refused to quit until the killer was found. >> we've cared about this family, they cared about solving this murder. they weren't going to give up. and they didn't. >> kurt thomas says he was a lucky kid. he got to grow up in cedar rapids, iowa. it >> was a magical level. we didn't know anything but fun. >> a lot of that fun happened at the mall,. four teenagers, it was the place to shop, eat and hang out. that's where the kids hung, her? >> it was a place you could go at anytime. and it was feebly deal. >> high school senior michelle martinko was normal right. but she did shop and work at one near her home. michelle was a top student

here's dennis murphy with "she never left. " >> she'd been gone from his life, unaccounted for, for more than 20 years. his mother, bonnie. >> it was odd to be the one that found her. >> because you'd spent a lot of your life looking for her, is right? >> yes, sir. >> there's a poignant video of the mother and child's last christmas morning together. december 1992. the boy, aaron, was 3 1/2. >> yes! >> we can watch that later. >> you've seen maybe some home movies and some old pictures. >> yeah, recently i've seen some -- a christmas video. >> you like that? >> yeah. >> it didn't trigger any memory. >> no memory goes with that? >> no, sir. >> can't remember so much as a touch or the sound of her voice. but this story is all about memories. memories lost. memories later testified to. had the child, now a grown man, really seen something as terrible as all that? this is a boy's story like few others. go back in time to january 1993 in jacksonville, florida. it's just after the holidays, and there's an argument going on inside that modest starter home on dolphin avenue. the young wife, just

dennis murphy: it was called angel's landing,

dennis murphy: turned deadly mystery. the notes say, we are following you.

they could be your next-door neighbor it could be someone you work with >> murphy -- dennis, you used you're one of the dateline guys. i like it because you do stories about the wrongdoers being brought to account >> probably couldn't answer this, there's been so many stories. do any one of them stick out? >> one for me was in new mexico. a girl was left for dead she ended up surviving she was in a coma for months almost a decade went by. 25 surgeries they finally caught her attacker and she was able to testify against him and she had her final surgery recently to get her smile back >> wow >> keith, you've got the premier on friday, if i'm not mistaken what's -- what are we -- >> going to a small town in kentucky a place called pembroke. maybe 700, 800 people there. a place where murders never occur. >> until they do. >> why were the three of them? >> three of them >> and who were they >> how many poles did you lean up against >> a bunch >> you never know what's going on with your neighbors secrets, secrets, secrets. >> stay in the big city. >> 24/7, now, "dateline." >> it's out there

dennis michael mulligan peter james mulligan michael joseph mullin james donald munhall nancy muaiz francisco heladio munoz carlos mario munoz theresa munson robert michael murach cesar augusto murillo marc a. murolo brian joseph murphyes anthony murphy christopher w. murphy edward charles murphy james f. murphy iv james thomas murphy kevin james murphy patrick jude murphy patrick sean murphy raymond e. murphy >> and my grandfather and my grandmother. we miss you and love you so much. we wish we had more time with you and i know you are looking over us every day. >> and my brother. manny, as he was known. for piloting his plane, riding his motorcycle, and being in service with his friends. he was adventurous, loving, and a god-fearing man. we all miss him and remember him especially mom watching from puerto rico. most importantly, he is remembered by god as are all the victims. we have faith in the promise he had mentioned in the book of john verse 28 and 29. [applause] ♪ robert eddie murphy, jr. john joseph murray john joseph murray susan d. murray valerie victoria murray richard todd myhre louis j. nacke ii robert b. nagel mildred rose naiman takuya nakamura alexander john robert napier frank joseph naples iii john

dennis michael mulligan >> peter james mulligan >> michael joseph mullin >> james donald munhall >> nancy muiz >> francisco heladio munoz >> carlos mario munoz >> theresa munson >> robert michael murach >> cesar augusto murillo >> marc a. murolo >> brian joseph murphyw. murphy >> edward charles murphy >> james f. murphy iv >> james thomas murphy >> kevin james murphy >> patrick jude murphy >> patrick sean murphy >> raymond e. murphy >> and my grandfather, james anthony and my grandmother. we miss you and love you so much. we wish we had more time with you and i know you are looking over us every day. >> my brother. many as he was known. family and friends knew he loved piloting a plane, scuba diving, field service with his friends. adventurous, loving and a god-fearing man. we will miss manny, especially mom, his two nephews. the most importantly, is remembered. we have faith in the promises in the book of john, chapter five, verse 28 and 29. [applause] >> robert eddie murphy, jr. >> john joseph murray >> john joseph murray >> susan d. murray >> valerie victoria murray >> richard todd myhre >> louis j. nacke ii >> robert b. nagel >> mildred rose naiman >> takuya nakamura >> alexander john robert napier >> frank joseph naples iii >> john philip napo